Overview
ISO 4918:2016/Amd 1:2018 is an amendment to the international standard ISO 4918:2016, which specifies the castor chair test for assessing resilient, textile, and laminate floor coverings. This amendment focuses specifically on the surface hardness requirements for castor chair wheels used in the test methodology. Developed by ISO Technical Committee ISO/TC 219, this standard update enhances the accuracy and consistency of testing floor coverings for durability and wear resistance under conditions simulating real-world use with office chairs.
Key Topics
- Castor Chair Test: A standardized procedure to evaluate the resistance of flooring materials to indentation and surface damage from castor chair wheels.
- Surface Hardness Requirements:
- Type H Castors: Equipped with plain polyamide wheels, featuring a hard tread with a surface hardness of 95 ± 5 Shore A. These wheels are single-color and replaced every 2,000,000 test cycles.
- Type W Castors: Equipped with resilient-tyred polyurethane wheels, featuring a soft tread with a surface hardness of 90 ± 5 Shore A. Wheels are replaced after 1,000,000 test cycles.
- Material Specifications: The amendment provides clear criteria on castor wheel materials and hardness for consistent and replicable results.
- Test Cycles and Maintenance: Specifies the lifespan of castor chair wheels during testing to maintain reliability of test outcomes.
Applications
- Flooring Manufacturers: Utilize the standard to validate the durability and quality of resilient, textile, and laminate floorings under repetitive mechanical stress.
- Quality Assurance Testing Labs: Implement the castor chair test with updated surface hardness parameters for accurate product certification.
- Specification Writers and Architects: Reference the standard when selecting floor coverings for environments exposed to office chair traffic, such as commercial offices and healthcare facilities.
- Product Development: Enables R&D teams to design flooring solutions resistant to castor chair damage, enhancing product longevity and customer satisfaction.
Related Standards
- ISO 10581 – Textile floor coverings - Specification for tufted carpets
- ISO 10874 – Classification of residential, commercial, and light industrial floor coverings
- EN 425 – Resilient floor coverings – Castor chair test (European standard aligned with ISO 4918)
- ISO 2424 – Textile floor coverings - Vocabulary, useful for understanding standardized terminology in flooring materials and tests
By adhering to ISO 4918:2016/Amd 1:2018, stakeholders in the flooring industry can ensure that their testing procedures are robust, reproducible, and compliant with internationally recognized surface hardness specifications. This leads to better product performance assessment and contributes to improved floor covering solutions for environments subject to intensive chair castor traffic.
Open preview (PDF)Resilient, textile and laminate floor coverings — Castor chair test — Amendment 1: Surface hardness